Optical structure and vehicle lamp
By using a combination of light guide and reflector in the optical structure of the through-type taillight, the dark area problem caused by inconsistent Z-direction width is solved, the number of LEDs is reduced and the cost is reduced, and the uniform lighting effect of the car light is achieved.
Patent Information
- Application Number
- CN202420389960.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-28
AI Technical Summary
Existing through-type taillights are prone to dark areas when the Z-direction width is inconsistent, and a large number of LEDs and large-area PCB boards are required when using a full-reflective mirror solution, resulting in increased costs.
An optical structure is designed, including a light source, a light guide and a first reflector located on the light side of the light guide. The light guide is provided with a light redirection structure, and the light ray is reflected to the first reflector through the first directional structure and the second directional structure. Different locations to achieve uniform distribution of light.
The number of LEDs is reduced, ensuring uniform lighting of the Z-directional inconsistent area of the headlights, reducing the cost of LEDs and PCB boards, and improving the light efficiency.
Smart Images
Figure CN222164537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tail lamps, and in particular to an optical structure and a vehicle lamp. Background Art
[0002] As a lighting and signal indicator, the car taillight plays an important role in the car structure. It mainly integrates the functions of rear position light, brake light, rear fog light, reversing light, etc. With the development of the automobile industry and the demand of users for car styling, the current car taillights are gradually changing from focusing on functionality to taking into account both functionality and decoration. Through-type taillights have received widespread attention.
[0003] When the existing implementation scheme lights up the through-type taillights with inconsistent width in the Z direction, the light guide of the through-type taillights is prone to dark areas in the Z direction due to its light-emitting angle problem. In response to the above problem, the more common solution is to use a full reflector solution for lighting. However, although this solution can light up the through-type taillights, it requires a large number of LEDs and requires a large area PCB board or multiple PCB boards. Therefore, it will lead to an increase in the LED material cost and PCB board design cost. Therefore, how to provide a new design solution to eliminate the dark area and achieve uniform lighting of the through-type taillights while reducing the number of LEDs and the PCB board area is important and meaningful. Utility Model Content
[0004] The utility model aims to provide an optical structure and a vehicle lamp, which can reduce the number of LEDs used in the vehicle lamp and ensure uniform lighting of the vehicle lamp with inconsistent width in the Z direction.
[0005] The embodiment of the utility model is achieved as follows:
[0006] In one aspect of the utility model, an optical structure is provided, which includes a light source, a light guide located at the light emitting side of the light source, and a first reflector located at the light emitting side of the light guide; a light redirecting structure is provided on the light guide, and the light redirecting structure includes a first directional structure and a second directional structure arranged along the central axis of the light guide; light emitted from the light source is transmitted to the light redirecting structure through the light guide, and at least part of the light is reflected by the first directional structure and the second directional structure to different positions of the reflection surface of the first reflector, so as to be reflected by different positions of the reflection surface of the first reflector and then emitted. The optical structure can reduce the number of LEDs used in the vehicle lamp, and can ensure uniform lighting of vehicle lamps with inconsistent width in the Z direction.
[0007] Optionally, the reflective surface of the first reflector is a curved surface, and the focal line of the first reflector is located at or near the central axis of the light guide.
[0008] Optionally, the reflective surface of the first reflector has a first reflective region and a second reflective region, and a size of the first reflective region in the first direction is larger than that of the second reflective region.
[0009] Optionally, the first reflective area is close to or far away from the light source.
[0010] Optionally, the length of the first directional structure along the central axis of the light guide is greater than the length of the second directional structure along the central axis of the light guide, and the first reflection area corresponds to the second directional structure.
[0011] Optionally, the optical structure further includes a second reflector, and the second reflector is correspondingly arranged at the end of the light guide.
[0012] Optionally, the optical structure further includes a light guide mounting member, the light guide mounting member is formed as an integral member with the first reflector and the second reflector, and a groove for accommodating the light guide is provided on the light guide mounting member.
[0013] Optionally, a light-transmitting member is disposed on the light-emitting side of the first reflector, and the light reflected from the first reflector or the second reflector can be emitted through the light-transmitting member.
[0014] Optionally, a reflective coating is coated on the inner wall of the groove, and the reflective coating is used to reflect the leaked light that has not passed the light emitting surface of the light guide back into the light guide.
[0015] Optionally, the optical structure further includes a third reflector, which is connected to a side of the first reflector away from the light guide to jointly form a semi-enclosed structure with an opening.
[0016] Optionally, the light guide includes a first light guide and a second light guide connected to each other, and the first directional structure and / or the second directional structure is provided on the first light guide or the second light guide.
[0017] Another aspect of the present invention provides a vehicle lamp, which comprises the above-mentioned optical structure.
[0018] The beneficial effects of the utility model include:
[0019] The optical structure provided by the present application includes a light source, a light guide located at the light emitting side of the light source, and a first reflector located at the light emitting side of the light guide; a light redirecting structure is provided on the light guide, and the light redirecting structure includes a first directional structure and a second directional structure arranged along the central axis direction of the light guide; the light emitted by the light source is transmitted to the light redirecting structure through the light guide, and at least part of the light is reflected to different positions of the reflection surface of the first reflector by the first directional structure and the second directional structure respectively, so as to be reflected by different positions of the reflection surface of the first reflector and then emitted. The present application sets a first directional structure and a second directional structure for reflecting light, and the light reflected by the first directional structure and the second directional structure corresponds to different positions of the reflection surface of the first reflector. In this way, on the one hand, the problem that a large number of LEDs are required for the full reflector solution in the prior art can be solved by setting a light guide combined with a reflector; on the other hand, the problem of uneven lighting caused by inconsistent Z-direction width of the vehicle lamp is solved by setting the first directional structure and the second directional structure corresponding to different positions of the reflection surface of the first reflector, that is, the setting of the light redirecting structure is increased for the area with a larger Z-direction width to improve the light efficiency, so that the area with a larger Z-direction width can also be evenly lit. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 One of the structural schematic diagrams of the optical structure provided by the embodiment of the utility model;
[0022] Figure 2 The second structural schematic diagram of the optical structure provided by the embodiment of the utility model;
[0023] Figure 3 The third structural diagram of the optical structure provided by the embodiment of the utility model;
[0024] Figure 4 A fourth structural schematic diagram of an optical structure provided in an embodiment of the utility model;
[0025] Figure 5 A schematic diagram of the structure of a light source and a light guide provided in an embodiment of the utility model;
[0026] Figure 6 One of the structural schematic diagrams of the light guide provided in the embodiment of the utility model;
[0027] Figure 7The second structural schematic diagram of the light guide provided by the embodiment of the utility model;
[0028] Figure 8 One of the optical path structure diagrams of the optical structure provided by the embodiment of the utility model;
[0029] Fig. 9 The second optical path structure diagram of the optical structure provided by the embodiment of the utility model;
[0030] Fig.10 The third optical path structure diagram of the optical structure provided in the embodiment of the utility model.
[0031] Icons: 10 - light source; 20 - light guide; 21 - first light guide; 22 - second light guide; 30 - first reflector; 40 - light redirecting structure; 41 - first directional structure; 42 - second directional structure; a - first direction; 50 - second reflector; 51 - mounting hole; 60 - third reflector; 70 - light transmitting part; 80 - light guide mounting part; 81 - groove. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.
[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0038] Please refer to Figures 1 to 4 This embodiment provides an optical structure, which includes a light source 10, a light guide 20 located at the light emitting side of the light source 10, and a first reflector 30 located at the light emitting side of the light guide 20; a light redirecting structure 40 is provided on the light guide 20, and the light redirecting structure 40 includes a first directional structure 41 and a second directional structure 42 arranged along the central axis direction of the light guide 20; the light emitted by the light source 10 is transmitted to the light redirecting structure 40 through the light guide 20, and at least part of the light is reflected by the first directional structure 41 and the second directional structure 42 to different positions of the reflection surface of the first reflector 30, so as to be reflected by different positions of the reflection surface of the first reflector 30 and then emitted. This optical structure can reduce the number of LEDs used in the vehicle lamp, and can ensure uniform lighting of the vehicle lamp with inconsistent width in the Z direction.
[0039] The optical structure at least includes a light source 10, a light guide 20 and a first reflector 30. In this embodiment, the light source 10 is used to emit light, and the light guide 20 is provided on the light emitting side of the light source 10, and is used to receive light from the light source 10 and to conduct the light along the length direction of the light guide 20. It should be noted that the length direction of the light guide 20 is the direction of the central axis of the light guide 20.
[0040] The light guide 20 is provided with a light redirecting structure 40, and the light redirecting structure 40 includes a first directional structure 41 and a second directional structure 42. It should be noted that both the first directional structure 41 and the second directional structure 42 can be used to reflect light.
[0041] The light emitted by the light source 10 is totally reflected and conducted in the light guide 20. When the light passes through the first directional structure 41 and the second directional structure 42, the first directional structure 41 and the second directional structure 42 can respectively reflect the light incident thereon to different positions of the reflection surface of the first reflector 30. The light incident on the first reflector 30 is reflected by the first reflector 30 and then emitted, thereby forming a target light pattern, such as Figure 8 shown.
[0042] It should be noted that the reflective surface of the first reflector 30 may be obtained by plating a film layer with reflective properties such as an aluminum film on a substrate, coating a material with reflective properties, etc., and the present application does not impose any limitation thereto.
[0043] In addition, in order to enable the optical structure to obtain a target light pattern, the reflective surface of the first reflector 30 may also be provided with a surface structure such as a pattern or a leather grain that can control the diffusion direction of light.
[0044] The specific structural type of the first directional structure 41 and the second directional structure 42 is not limited in this application, and can be a concave structure recessed on the surface of the light guide 20, or a toothed structure disposed on the surface of the light guide 20. In this application, by providing the first directional structure 41 and the second directional structure 42, the light beam can be reflected by the first directional structure 41 and the second directional structure 42 during the transmission along the light guide 20, so that the light beam is incident on the first reflector 30, so that the light emitting angle of the optical structure can be expanded and the dark area existing in the prior art can be eliminated; in addition, the reflection of the first reflector 30 can also make the light emitted from the optical structure more uniform, so as to achieve uniform lighting of the optical structure; and, compared with the prior art solution using multiple LEDs, this application can save the number of LEDs used and reduce the structural complexity and cost of the optical structure.
[0045] In summary, the optical structure provided in the present application includes a light source 10, a light guide 20 located on the light emitting side of the light source 10, and a first reflector 30 located on the light emitting side of the light guide 20; a light redirecting structure 40 is provided on the light guide 20, and the light redirecting structure 40 includes a first directional structure 41 and a second directional structure 42 arranged along the central axis direction of the light guide 20; the light emitted by the light source 10 is transmitted to the light redirecting structure 40 through the light guide 20, and at least part of the light is reflected by the first directional structure 41 and the second directional structure 42 to different positions of the reflective surface of the first reflector 30, so as to be emitted after being reflected by different positions of the reflective surface of the first reflector 30. The present application sets a first directional structure 41 and a second directional structure 42 for reflecting light, and the light reflected by the first directional structure 41 and the second directional structure 42 corresponds to different positions of the reflective surface of the first reflector 30. In this way, on the one hand, the problem that the full reflector solution in the prior art requires a large number of LEDs can be solved by setting the light guide 20 in combination with the first reflector 30; on the other hand, the problem of uneven lighting caused by inconsistent Z-direction width of the car light can be solved by setting the first directional structure 41 and the second directional structure 42 corresponding to different positions of the reflective surface of the first reflector 30, that is, the light redirecting structure 40 is added to the area with a larger Z-direction width to improve the lighting efficiency, so that the area with a larger Z-direction width can also be evenly lit.
[0046] Alternatively, if Figure 2 and Figure 3 As shown, the reflective surface of the first reflector 30 is a curved surface, and the focal line of the first reflector 30 is located at or near the central axis of the light guide 20 .
[0047] In this embodiment, the reflection surface of the first reflection mirror 30 has a first reflection area and a second reflection area, and the size of the first reflection area in the first direction a is larger than the size of the second reflection area in the first direction a.
[0048] Among them, the above-mentioned first reflection area can be close to the light source 10 or far away from the light source 10. This application does not impose any limitation on this and can be selected according to actual needs.
[0049] Please refer to Figures 5 to 7 Optionally, the length of the first directional structure 41 along the central axis of the light guide 20 is greater than the length of the second directional structure 42 along the central axis of the light guide 20 , and the first reflection area corresponds to the second directional structure 42 .
[0050] like Figure 6 and Figure 7As shown, the dimension of the first directional structure 41 along the central axis direction of the light guide 20 is greater than the dimension of the second directional structure 42 along the central axis direction of the light guide 20 (i.e., the length of the first directional structure 41 is greater than the length of the second directional structure 42), wherein the specific size parameters of the first directional structure 41 and the second directional structure 42 are not limited in this application and can be determined according to the modeling requirements.
[0051] Please refer to Figure 1 Optionally, the optical structure further includes a second reflector 50 , and the second reflector 50 is correspondingly arranged at the end of the light guide 20 .
[0052] That is, the first reflector 30 is located at one side of the light guide 20, and the second reflector 50 is located at the end of the light guide 20. In this way, the light can be reflected in multiple directions to improve the light utilization rate.
[0053] It should be noted that the second reflector 50 may include one or two. When the second reflector 50 includes one, the second reflector 50 may be disposed at one end of the light guide 20; when the second reflector 50 includes two, the two second reflectors 50 are disposed at opposite ends of the light guide 20, such as Figure 1 shown.
[0054] When there are two second reflectors 50, the two second reflectors 50 are respectively connected to opposite sides of the first reflector 30. Of course, the first reflector 30 and the two second reflectors 50 can be connected to each other to form a whole, or can be integrally formed.
[0055] Optionally, the optical structure further includes a light guide mounting member 80, the light guide mounting member 80 is formed as an integral member with the first reflector 30 and the second reflector 50, and a groove 81 for accommodating the light guide 20 is provided on the light guide mounting member 80, such as Figure 1 and Figure 2 shown.
[0056] Optionally, a light-transmitting member 70 may be provided on the light-emitting side of the first reflector 30, and the light reflected from the first reflector 30 or the second reflector 50 can be emitted from the light-transmitting member 70. It should be noted that the light-transmitting member 70 is arranged on the light-emitting side of the optical structure. Fig. 9 and Fig.10 As shown, after passing through the optical structure, the light can be emitted from the light-transmitting member 70, and the light-transmitting member 70 can be provided with a light-distributing lens having patterns, leather grains or other materials with diffusion properties, so that the light emitted from the optical structure can eventually form a target light pattern.
[0057] In order to further improve the light efficiency, optionally, a reflective coating is coated on the inner wall of the groove 81 , and the reflective coating is used to reflect the leaked light from the light emitting surface back into the light guide 20 .
[0058] Please refer to Figure 1 and Figure 2 Optionally, when there are two second reflectors 50, the two second reflectors 50 may be provided with mounting holes 51 respectively, and the opposite ends of the light guide 20 are respectively inserted into the two mounting holes 51. In this way, the bracket for mounting the light guide 20 can be omitted, making the overall structure of the optical structure more concise. Of course, in other embodiments, such as Figure 1 As shown, a light guide mounting member 80 for mounting the light guide 20 may also be provided correspondingly without providing the mounting hole 51 .
[0059] Optionally, see Fig. 9 and Fig.10 The optical structure further includes a third reflector 60, which is connected to the side of the first reflector 30 away from the light guide 20 to form a semi-enclosed structure with an opening. In this way, the light guide 20 is semi-enclosed, which can greatly improve the light utilization rate and the uniformity of the light.
[0060] It should be noted that the third reflector 60 may include one or two. When the third reflector 60 includes two, the two third reflectors 60 are distributed along the first direction a on opposite sides of the light guide 20. When the third reflector 60 includes two, the two third reflectors 60 may be connected to opposite sides of the first reflector 30, respectively.
[0061] In addition, when the optical structure further includes the second reflector 50, the second reflector 50, the third reflector 60 and the first reflector 30 can be connected respectively.
[0062] The size of the opening of the semi-enclosed structure is determined by the size of the light-emitting surface, and this application does not impose any specific limitation.
[0063] In order to effectively utilize the reflective surfaces of each reflector to achieve uniform lighting of the optical structure, the light guide 20 is optionally fixed at the middle position of the semi-enclosed structure, such as Fig. 9 and Fig.10 shown.
[0064] In addition, in this embodiment, the light guide 20 may include only one light guide 20. Fig. 9 as shown; alternatively, see Fig.10 The above-mentioned light guide 20 also includes a first light guide 21 and a second light guide 22 connected to each other. In this case, the first directional structure 41 and / or the second directional structure 42 are arranged on the first light guide 21 or the second light guide 22.
[0065] Another aspect of the present invention provides a vehicle lamp, which includes the above optical structure. Since the specific structure and beneficial effects of the above optical structure have been described in detail above, the present application will not repeat them here.
[0066] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
[0067] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.
Claims
1. An optical structure, characterized in that: It comprises a light source, a light guide located at the light emitting side of the light source, and a first reflector located at the light emitting side of the light guide; the light guide is provided with a light redirecting structure, and the light redirecting structure comprises a first directional structure and a second directional structure arranged along the central axis direction of the light guide; The light emitted from the light source is transmitted to the light redirecting structure via the light guide, and at least part of the light is reflected by the first directional structure and the second directional structure to different positions of the reflective surface of the first reflector, so as to be reflected by different positions of the reflective surface of the first reflector and then emitted.
2. The optical structure according to claim 1, characterized in that: The reflecting surface of the first reflector is a curved surface, and the focal line of the first reflector is located at or near the central axis of the light guide.
3. The optical structure according to claim 1, characterized in that: The reflection surface of the first reflection mirror has a first reflection area and a second reflection area, and the size of the first reflection area in the first direction is larger than that of the second reflection area.
4. The optical structure according to claim 3, characterized in that: The first reflection area is close to or far away from the light source.
5. The optical structure according to claim 3, characterized in that: The length of the first directional structure along the central axis of the light guide is greater than the length of the second directional structure along the central axis of the light guide, and the first reflection area corresponds to the second directional structure.
6. The optical structure according to claim 1, characterized in that: The optical structure further includes a second reflector, which is correspondingly arranged at the end of the light guide.
7. The optical structure according to claim 6, characterized in that: The optical structure further includes a light guide mounting member, the light guide mounting member is formed as an integral member with the first reflector and the second reflector, and a groove for accommodating the light guide is disposed on the light guide mounting member.
8. The optical structure according to claim 6, characterized in that: A light-transmitting member is disposed on the light-emitting side of the first reflector, and the light reflected from the first reflector or the second reflector can be emitted through the light-transmitting member.
9. The optical structure according to claim 7, characterized in that: The inner wall of the groove is coated with a reflective coating, and the reflective coating is used to reflect the leaked light that has not passed the light-emitting surface of the light guide back into the light guide.
10. The optical structure according to claim 1, characterized in that: The optical structure further includes a third reflector connected to a side of the first reflector away from the light guide to form a semi-enclosed structure with an opening.
11. The optical structure according to claim 1, characterized in that: The light guide comprises a first light guide and a second light guide connected to each other, and the first directional structure and / or the second directional structure is arranged on the first light guide or the second light guide.
12. A vehicle lamp, characterized in that: The optical structure comprises any one of claims 1 to 11.