Automobile front decorative lamp diffusion light equalizing structure and optical system

Abstract

The utility model discloses an automobile front decorative lamp diffusion uniform light structure which comprises an inner lampshade and at least one inner lens, the outer surface of the inner lens is composed of a plurality of Fresnel patterns, and each Fresnel pattern is composed of a plurality of first strip-shaped optical teeth which are symmetrically arranged on the two sides of the center line of the Fresnel pattern side by side. By adopting the light diffusing and equalizing structure of the automobile front decorative lamp, not only can the light emitting brightness meet the application requirement, but also the light emitting uniformity can meet the application requirement, and meanwhile, the requirement on the processing precision is greatly reduced, so that the yield is greatly improved, and the manufacturing cost is further reduced. The utility model further discloses an optical system which comprises at least one PCBA integrated with a plurality of LED lamp beads and the automobile front decorative lamp diffusion and light equalization structure. By the adoption of the optical system, the LED lamp beads are arranged at the positions close to the midpoints of the center lines of the Fresnel patterns, the light emitting uniformity is good, and the light emitting brightness is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and in particular to a light diffusion and uniform light structure and an optical system of an automobile front decorative lamp. Background Art

[0002] Some countries and regions allow the installation of front decorative lights on the front of the car to enhance the overall aesthetics of the car.

[0003] Please refer to the Chinese utility model patent with publication number CN214948811U. The applicant in this case has designed an inner lens that can evenly distribute light in the length and width directions of the inner lens through dense small optical surfaces, so that the lighting brightness of the entire inner lens is very uniform. However, the applicant found in the application that due to excessively uniform light distribution, especially the light distribution through small optical surfaces in the width direction of the inner lens, the light attenuation of the LED lamp beads is relatively serious, and the brightness of the inner lens output surface is not good, which cannot meet the application requirements as a front decorative lamp for automobiles. Therefore, the brightness of the inner lens output surface can only be improved by replacing higher-power LED lamp beads, which not only increases the cost, but also increases the heat generation, affecting the stability of the lamp. In addition, the dense small optical surfaces of the light-emitting surface of the inner lens have extremely high processing accuracy requirements, resulting in a low yield rate and high manufacturing costs. Utility Model Content

[0004] In order to solve the technical problems that the existing inner lens has very good lighting uniformity but poor light brightness and is difficult to process, the utility model provides a light diffusion and uniform light structure and an optical system for a front decorative lamp of an automobile.

[0005] The technical solution is as follows:

[0006] The first aspect of the present application relates to a diffuser and light-homogenizing structure for a front decorative lamp of an automobile, comprising an inner lampshade and at least one inner lens, wherein the inner lampshade has at least one inner lampshade light-transmitting band made of a light-transmitting plastic material, and each inner lens is respectively located on the inner side of the corresponding inner lampshade light-transmitting band, and the inner surface of the inner lens has an inner lens light-entering surface, and the outer surface of the inner lens is composed of a plurality of Fresnel patterns, and the Fresnel pattern is composed of a plurality of first strip optical teeth symmetrically arranged side by side on both sides of its center line, and the inclination angle of each first strip optical tooth relative to the inner lens light-entering surface gradually increases with the increase of the distance from the center line of the Fresnel pattern, and the outer surface of the inner lampshade light-transmitting band is provided with second strip optical teeth arranged side by side along its length direction, and each second strip optical tooth on the same inner lampshade light-transmitting band together forms a wavy or sawtooth structure.

[0007] The above-mentioned diffusion and uniform light structure of the front decorative lamp of the automobile is adopted, and the inner lens itself is made of diffusion material. In the width direction of the inner lens, the diffusion is only carried out by the material itself, and in the length direction of the inner lens, the diffusion is not only carried out by the material itself, but also by the cooperation of the specially designed first strip optical teeth. The inner lens can achieve the application requirements of both the brightness of the light and the uniformity of the light. There is no need to use high-power LED lamp beads, which reduces the manufacturing cost and heat generation, and improves the stability and reliability of the lamp. At the same time, the second strip optical teeth with a wavy structure on the inner lampshade are used in cooperation with the Fresnel pattern to further improve the uniformity of the final light and the light emission effect. In addition, since the first strip optical teeth of the Fresnel pattern are in a side-by-side vertical strip structure, compared with the dense small optical surface in the Chinese utility model patent with the publication number CN214948811U, the requirements for processing accuracy are greatly reduced, thereby greatly improving the yield rate and further reducing the manufacturing cost.

[0008] In some embodiments, the inner lampshade has an inner lampshade support body made of a light-shielding plastic material, and the inner lampshade support body and each inner lampshade light-transmitting band are integrally formed by a two-color injection molding process.

[0009] In some embodiments, the light-transmitting bands of the inner lampshade all protrude outward from the inner lampshade support body.

[0010] In some embodiments, the inner lens is made of polymethyl methacrylate.

[0011] A second aspect of the present application relates to an optical system, comprising at least one PCBA integrated with a plurality of LED lamp beads and the above-mentioned automotive front decorative lamp diffusion and light-homogenizing structure, wherein each PCBA is located on the inner side of a corresponding inner lens, each LED lamp bead corresponds to each Fresnel pattern one by one, and the projection of each LED lamp bead on the corresponding Fresnel pattern is located at or close to the midpoint of the center line of the Fresnel pattern.

[0012] By adopting the above optical system and arranging the LED lamp beads near the midpoint of the center line of each Fresnel pattern, not only the light output is uniform, but also the light output brightness is high.

[0013] In some embodiments, at least some of the light-transmitting strips of the inner lampshade are distributed in a linear array.

[0014] In some embodiments, a plurality of inner lens mounting seats are integrally formed on the inner lens, and each inner lens mounting seat is fixedly connected to a corresponding PCBA via a connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the matching relationship between PCBA, inner lens and inner lampshade;

[0016] Figure 2 It is a schematic diagram of the matching relationship between the inner lens and the inner lampshade;

[0017] Figure 3 It is a schematic diagram of the matching relationship between PCBA and inner lens;

[0018] Figure 4 It is a schematic diagram of the structure of PCBA;

[0019] Figure 5 is a schematic diagram of the structure of the inner lens;

[0020] Figure 6 It is a schematic diagram of the structure of the inner lampshade. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with embodiments and drawings.

[0022] Embodiment 1:

[0023] like Figure 2 , Figure 5 and Figure 6 As shown, a light diffusion and uniform light structure of a front decorative lamp of an automobile mainly comprises an inner lampshade 1 and at least one inner lens 2, that is, the number of the inner lenses 2 can be one or more.

[0024] The inner lampshade 1 has at least one inner lampshade light-transmitting band 11 made of light-transmitting plastic material, and each inner lens 2 is located on the inner side of the corresponding inner lampshade light-transmitting band 11, that is, the light emitted by each inner lens 2 enters the inner lampshade 1 and then passes through each inner lampshade light-transmitting band 11.

[0025] In this embodiment, the inner surface of the inner lens 2 has an inner lens light-entering surface 21, which is a planar structure. The inner lens light-entering surface 21 can also have other optical structures such as a concentrator, leather texture or optical pattern. The outer surface of the inner lens 2 is composed of a plurality of Fresnel patterns 22.

[0026] In the prior art, the Fresnel pattern 22 is usually composed of a plurality of concentric annular optical teeth, which have high brightness and good focusing effect. In the present embodiment, the Fresnel pattern 22 is composed of a plurality of first strip-shaped optical teeth 221 symmetrically arranged side by side on both sides of its center line, and the inclination angle of each first strip-shaped optical tooth 221 relative to the light-entering surface 21 of the inner lens gradually increases with the increase of the distance from the center line of the Fresnel pattern 22. Therefore, the Fresnel pattern 22 in the present embodiment can not only diffuse the light through the first strip-shaped optical teeth 221 of each vertical stripe structure and the gradually inclined design, so that the light output uniformity of the inner lens 2 meets the application requirements, but also has a certain focusing effect, so that the light output brightness of the inner lens 2 can meet the application requirements, thereby eliminating the need to use high-power LED lamp beads, reducing the manufacturing cost and heat generation, and improving the stability and reliability of the lamp. In addition, the first strip-shaped optical teeth 221 of each vertical stripe structure of the Fresnel pattern 22 greatly reduce the requirements for processing accuracy, thereby greatly improving the yield rate and further reducing the manufacturing cost.

[0027] At the same time, the outer surface of the inner lampshade light-transmitting belt 11 of the present embodiment is provided with second strip optical teeth 111 arranged side by side along the length direction thereof, and the second strip optical teeth 111 on the same inner lampshade light-transmitting belt 11 together form a wavy or sawtooth structure. Therefore, the second strip optical teeth 111 with a wavy structure on the inner lampshade 1 cooperate with the Fresnel pattern 22 of the inner lens 2 to further improve the uniformity of the final light output and improve the light output effect.

[0028] Furthermore, the material of the inner lens 2 is polymethyl methacrylate, which not only has an excellent diffusion effect on light, but also allows the light to diffuse to the surroundings, and has low cost. In this embodiment, the specific model of the material of the inner lens 2 is preferably PMMA df208N, which has excellent scratch resistance and weather resistance. At the same time, the inner lens 2 is integrally formed, which not only has high structural strength, but also ensures optical effects.

[0029] In this embodiment, the inner lampshade 1 has an inner lampshade support body 12 made of a light-shielding plastic material. The inner lampshade support body 12 and each inner lampshade light-transmitting band 11 are integrally formed using a two-color injection molding process. Not only does it have high structural strength, but it can also highlight the visual effect of each inner lampshade light-transmitting band 11, while also being able to shield internal components.

[0030] Furthermore, the inner lampshade light-transmitting bands 11 all protrude outward from the inner lampshade support body 12, which can present a three-dimensional lighting effect and further enhance the visual effect after lighting.

[0031] In this embodiment, each inner lampshade light-transmitting strip 11 is protruding to form a crystal structure with clear edges and corners, and has a beautiful appearance and a sense of technology.

[0032] Embodiment 2:

[0033] See also Figure 1-Figure 6 An optical system includes at least one PCBA 3 and the diffuser and light-averaging structure of the automotive front decorative lamp of Example 1, wherein each PCBA 3 is located on the inner side of the corresponding inner lens 2, that is, each PCBA 3 is located on the side of the corresponding inner lens 2 away from the inner lampshade 1, and a plurality of LED lamp beads 31 are integrated on the PCBA 3, that is, each LED lamp bead 31 is located on the side of the corresponding PCBA 3 close to the corresponding inner lens 2, each LED lamp bead 31 corresponds to each Fresnel pattern 22 one by one, and the projection of each LED lamp bead 31 on the corresponding Fresnel pattern 22 is located at or close to the midpoint of the center line of the Fresnel pattern 22.

[0034] Therefore, through such a design, the LED lamp bead 31 is arranged near the midpoint of the center line of each Fresnel pattern 22, which not only has good light uniformity but also high light brightness.

[0035] Furthermore, at least part of the inner lampshade light-transmitting bands 11 are distributed in a linear array. Therefore, by controlling the lighting sequence and color of each LED lamp bead 31 through software, a unique crystal water effect can be formed, which is full of technological sense. Accordingly, each LED lamp bead 31 is an RGB LED lamp bead.

[0036] In this embodiment, a plurality of inner lens mounting seats 23 are integrally formed on the inner lens 2, and each PCBA 3 is fixedly connected to the corresponding inner lens mounting seat 23 via a connector, thereby ensuring a reliable connection between the inner lens 2 and the PCBA 3, thereby locking the relative position of each LED lamp bead 31 and the corresponding Fresnel pattern 22, and ensuring the final lighting effect.

[0037] Furthermore, the outer edge of the inner lens 2 has a raised edge 24 protruding inward, and each inner lens mounting seat 23 is formed on the raised edge 24, thereby increasing the distance between each LED lamp bead 31 and the inner lens light-incoming surface 21, so that the light emitted by each LED lamp bead 31 can cover a larger area. Accordingly, the number of LED lamp beads 31 used can be reduced, thereby reducing the manufacturing cost.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A light diffusion and uniform light structure for a front decorative lamp of an automobile, comprising an inner lampshade and at least one inner lens, wherein the inner lampshade has at least one inner lampshade light-transmitting band made of a light-transmitting plastic material, and each inner lens is located on the inner side of the corresponding inner lampshade light-transmitting band, characterized in that: The inner surface of the inner lens has an inner lens light-entering surface, the outer surface of the inner lens is composed of a plurality of Fresnel patterns, the Fresnel pattern is composed of a plurality of first strip optical teeth symmetrically arranged side by side on both sides of its center line, the inclination angle of each first strip optical tooth relative to the inner lens light-entering surface gradually increases with the increase of the distance from the center line of the Fresnel pattern, the outer surface of the inner lampshade light-transmitting band is provided with second strip optical teeth arranged side by side along its length direction, and the second strip optical teeth on the same inner lampshade light-transmitting band together form a wavy or sawtooth structure.

2. The light diffusion and uniform light structure of the automobile front decorative lamp according to claim 1, characterized in that: The inner lampshade comprises an inner lampshade support body made of a light-shielding plastic material, and the inner lampshade support body and each inner lampshade light-transmitting band are integrally formed by a two-color injection molding process.

3. The light diffusion and uniform light structure of the automobile front decorative lamp according to claim 2, characterized in that: The inner lampshade light-transmitting belts all protrude outwards from the inner lampshade supporting body.

4. The light diffusion and uniform light structure of the automobile front decorative lamp according to claim 1, characterized in that: The material of the inner lens is polymethyl methacrylate.

5. An optical system, characterized in that: The invention comprises at least one PCBA integrated with a plurality of LED lamp beads and the light diffusion and uniform light structure of the automotive front decorative lamp according to any one of claims 1 to 4, wherein each PCBA is located on the inner side of the corresponding inner lens, each LED lamp bead corresponds to each Fresnel pattern one by one, and the projection of each LED lamp bead on the corresponding Fresnel pattern is located at or close to the midpoint of the center line of the Fresnel pattern.

6. The optical system according to claim 5, characterized in that: At least some of the light-transmitting strips of the inner lampshade are distributed in a linear array.

7. The optical system according to claim 5, characterized in that: A plurality of inner lens mounting seats are integrally formed on the inner lens, and each inner lens mounting seat is fixedly connected to a corresponding PCBA via a connecting piece.

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