Automobile LOGO lamp

Abstract

The utility model discloses an automobile LOGO lamp which comprises a shell and a lampshade which are assembled with each other and form a containing space, a PCB is arranged in the containing space and close to the shell, a light homogenizing plate is arranged in the containing space and close to the lampshade, and a light guide plate is arranged between the PCB and the light homogenizing plate. A plurality of LED light sources are arranged on the PCB, corresponding collimation spherical surfaces are formed on the side, close to the PCB, of the light guide plate body part and right opposite to the LED light sources, and reflection arc surfaces are formed on the side, away from the PCB, of the light guide plate body part and correspond to the back sides of the collimation spherical surfaces. The tail end of the light guide plate away from the main body part is provided with a light-emitting surface; the lampshade comprises a non-light-transmitting layer and a light-transmitting layer which are distributed at an interval, and the light-transmitting layer corresponds to the main body part of the light guide plate and the light-emitting surface in position. According to the utility model, large-area lighting can be realized through fewer LEDs, the lighting effect is more uniform, and the design requirement of a higher-standard LOGO model can be met.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to an automotive logo light. Background Technology

[0002] Car logo lights are lighting devices installed on the front, rear, or wheel wells of a vehicle to display the car's brand logo. They not only serve a brand identification function but also contribute to the car's personalized design, enhancing its technological or luxurious appearance. Common logo light types include "backlit" (within-light): These have an internal LED light source; when illuminated, the bright spots are not visible, providing even illumination of the logo pattern or outline. "Hidden" (integrated into the car body when off, only becoming visible when illuminated). Both backlit and hidden types share the common characteristic of requiring even illumination.

[0003] Uniformity of brightness is a key characteristic of logo lights. To this end, current logo lights on the market generally use light guide plates or light-diffusing plates to enhance uniformity. However, to achieve noticeable logo brightness, a large number of LEDs are usually required, resulting in high costs. Furthermore, in areas where LEDs are densely packed, light tends to concentrate, creating bright spots and hindering uniform illumination. Meanwhile, a car logo light with patent number CN217978662U, which arranges LEDs behind a light-shielding film, does address the issue of bright spots and improve the uniformity of light emission. However, the luminous area is significantly affected by the spatial shape of the light guide plate, thus limiting the logo's outline and failing to meet the diverse and complex design requirements of logos. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a car logo light that can achieve large-area illumination with fewer LEDs and has a more uniform illumination effect, which can meet the higher standard of logo design requirements.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A car logo light includes a housing and a lampshade that are assembled together to form a receiving space. A PCB board is disposed near the housing in the receiving space, a light-diffusing plate is disposed near the lampshade in the receiving space, and a light guide plate is disposed between the PCB board and the light-diffusing plate.

[0007] The PCB board is provided with a number of LED light sources. The main body of the light guide plate has a corresponding collimating spherical surface formed on the side of the PCB board that is close to the LED light source. The main body of the light guide plate has a reflective arc surface formed on the side of the light guide plate that is away from the PCB board and on the back side of the collimating spherical surface. The end of the light guide plate away from the main body has a light-emitting surface.

[0008] The lampshade includes a non-transparent layer and a transparent layer that are spaced apart, and the position of the transparent layer corresponds to the main body of the light guide plate and the light-emitting surface.

[0009] Furthermore, the number of collimating spherical surfaces, reflective arc surfaces, and LED light sources are equal.

[0010] Furthermore, the light-transmitting layer includes region A, which is adapted to the shape of the logo light, and region B, which is adapted to the outline of the shape. Region A corresponds to the main body of the light guide plate, and region B corresponds to the light-emitting surface of the light guide plate.

[0011] Furthermore, the main body of the light guide plate and the light-emitting surface are connected and transitioned by an arc-shaped light guide structure.

[0012] Furthermore, the light guide plate is also provided with a diffusion structure located between the reflective arc surfaces.

[0013] Furthermore, the diffusion structure is a through-hole hollow structure.

[0014] Furthermore, the diffusion structure is surrounded by diffusion patterns.

[0015] Furthermore, the lampshade has multiple welding ribs on its inner side, and the light-diffusing plate has multiple welding planes on the side near the lampshade. The welding ribs and welding planes are welded together in a one-to-one correspondence.

[0016] Furthermore, the light-emitting surface is provided with a diffusion pattern.

[0017] Furthermore, the surface of the light-diffusing plate is provided with a textured or patterned surface.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects:

[0019] 1. This utility model places the LED light source behind the light guide plate. By setting the front and back reflective arc surfaces and collimating spherical surfaces on the light guide plate, the light emitted by the LED light source can be amplified and emitted through the collimating spherical surfaces and reflective arc surfaces. Furthermore, total internal reflection inside the light guide plate achieves light emission from the front and end light emission surfaces. Thus, a large area can be illuminated with fewer LED light sources, reducing costs. Moreover, the illumination effect is more uniform thanks to the effect of the light uniform plate.

[0020] 2. This utility model sets a light-diffusing plate between the light guide plate and the lamp cover. The light-diffusing plate has the effect of diffuse reflection and diffusion of light to achieve uniform lighting. At the same time, a diffusion structure is set between the reflective arc surfaces of the light guide plate, which can effectively avoid the lighting defects of visible LED bright spots, thus greatly improving the overall uniformity of the vehicle headlight.

[0021] 3. The lampshade of this utility model is divided into areas by a non-transparent layer and a transparent layer. The position of the transparent layer corresponds to the main body of the light guide plate and the light-emitting surface. The transparent layer is further divided into area A, which is adapted to the shape of the logo lamp, and area B, which is adapted to the outline. Area A corresponds to the main body of the light guide plate, and area B corresponds to the light-emitting surface of the light guide plate. This can better meet the complex and diverse design requirements of the logo shape. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0023] Figure 2 This is a front view of the light guide plate according to an embodiment of the present utility model;

[0024] Among them, 1. PCB board; 2. LED light source; 3. light guide plate; 31. collimating spherical surface; 32. reflective arc surface; 32-1. reflective arc surface one; 32-2. reflective arc surface two; 32-3. reflective arc surface three; 33. light emitting surface; 34. diffusion structure; 36. arc-shaped light guide structure; 4. light uniform plate; 41. welding plane; 5. shell; 6. lampshade; 61. non-transparent layer; 62. transparent layer; 63. welding rib. Detailed Implementation

[0025] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] like Figure 1-2 As shown in this embodiment, a car logo light is provided, which mainly consists of a housing 5, a lampshade 6, a PCB board 1, a light-diffusing plate 4, a light guide plate 3, and LED light sources 2. The housing 5 and the lampshade 6 are welded together at their peripheral edges, which can be laser welding, vibration friction welding, ultrasonic welding, or hot plate welding. An internal space is formed between the housing 5 and the lampshade 6. The PCB board 1 is positioned near the housing 5 within this space, and multiple LED light sources 2 are mounted on the PCB board 1. The light-diffusing plate 4 is positioned near the lampshade 6 within this space, and the light guide plate 3 is positioned between the PCB board 1 and the light-diffusing plate 4. The PCB board 1, the light guide plate 3, and the housing 5 can be connected by riveting or screws. The light-diffusing plate 4 and the lampshade 6 are connected by welding, which can be laser welding or ultrasonic welding.

[0027] To achieve a large-area illumination effect with fewer LED light sources, this embodiment features a collimating spherical surface 31 formed on the side of the main body of the light guide plate 3 closest to the PCB board 1 and directly opposite the LED light source 2. A reflective arc surface 32 is formed on the side of the main body of the light guide plate 3 furthest from the PCB board 1, corresponding to the back side of the collimating spherical surface 31. The number of collimating spherical surfaces 31, reflective arc surfaces 32, and LED light sources 2 is equal, and their positions correspond one-to-one; that is, the axial direction of the light-emitting center of the LED light source 2, the central axial direction of the collimating spherical surface 31, and the central axial direction of the reflective arc surface 32 are the same and coincident. Simultaneously, a light-emitting surface 33 is provided at the end of the light guide plate 3 furthest from the main body. With this configuration, the LED light source 2 is positioned behind the light guide plate 3. Through the arrangement of the front and back reflective arc surfaces 32 and the collimating spherical surface 31 on the light guide plate 3, the light emitted by the LED light source 2 can be amplified and emitted through the collimating spherical surface 31 and the reflective arc surface 32, thus achieving the emission of light from the facial logo. Furthermore, the light undergoes total internal reflection inside the light guide plate 3 before being transmitted to the end light-emitting surface 33 for emission. This allows for the illumination of a large area with fewer LED light sources, reducing costs.

[0028] To meet the complexity and diversity of logo design requirements, the lampshade 6 in this embodiment includes a non-transparent layer 61 and a transparent layer 62 spaced apart. The position of the transparent layer 62 corresponds to the main body of the light guide plate 3 and the light-emitting surface 33. Specifically, the transparent layer 62 includes region A, which adapts to the shape of the logo light, and region B, which adapts to the outline. Region A corresponds to the main body of the light guide plate 3, and region B corresponds to the light-emitting surface 33 of the light guide plate 3. Region A, the transparent layer 62, is the main part of the logo shape. When the logo light is lit, the visible light part forms the illuminated shape of the logo, and the remaining non-illuminated parts are separated by the non-transparent layer 61 to achieve the effect of isolated illumination. Region A and region B are separated by the non-transparent layer 61, and region B corresponds to the end light-emitting surface 33 of the light guide plate 3. The light emitted from the light-emitting surface 33 passes through the transparent layer 62 of region B and is emitted. After region B is lit, it forms the outline of the logo light, which is generally a relatively regular circle, rectangle, or square. This allows for better fulfillment of the complexity and diverse design requirements of logo shapes, and allows for the reasonable customization of the logo's illuminated area, light-transmitting layer 62 area A, and area B according to specific needs.

[0029] Specifically, in this embodiment, an arc-shaped light guide structure 36 is designed to connect and transition the main body of the light guide plate 3 and the light-emitting surface 33. The arc-shaped light guide structure 36 changes the direction of light inside the light guide plate 3 by using a large-angle bend, so that the final light direction is towards the light-transmitting layer of the lampshade, ensuring that the light only illuminates the middle main body and the light-emitting surface 33.

[0030] To address the issue of bright LED spots, a diffusion structure 34 is also provided on the light guide plate 3 in this embodiment, located between the reflective arc surfaces 32. Specifically, the diffusion structure 34 is a through-type hollow structure, located between two closely spaced reflective arc surfaces 32, and diffusion patterns are provided around the diffusion structure 34 to improve uniformity. Due to the shape of the logo, adjacent LED light sources may be arranged relatively closely, such as... Figure 2 The three reflective surfaces 32-1, 32-2, and 32-3 form a triangular arrangement and are relatively close to each other. Bright spots are more likely to occur in the middle of the triangle. Therefore, a diffusion structure 34 is set at the bright spot position to prevent light from gathering, thereby effectively reducing the occurrence rate of bright spots and avoiding the visible bright spot defects of LEDs. This greatly improves the overall uniformity of the headlights.

[0031] Specifically, in this embodiment, the inner side of the lampshade 6 is provided with multiple welding ribs 63, and the side of the light-diffusing plate 4 near the lampshade 6 is provided with multiple welding planes 41. The welding ribs 63 and the welding planes 41 are welded together in a one-to-one correspondence, so that the lampshade 6 and the light-diffusing plate 4 are assembled. The light-diffusing plate 4 has the effect of diffuse reflection and diffusion of light to achieve uniform lighting. It can be formed directly from raw materials with diffusion properties, or it can be a part of a high light transmittance material with a light-diffusing treatment. The surface of the light-diffusing plate 4 is provided with a texture or pattern to improve the uniformity of lighting. The arrangement of the welding ribs 63 utilizes the shielding effect of the non-transparent layer 61 to make the welding ribs invisible, which is more aesthetically pleasing.

[0032] In addition, a diffusion pattern is also provided on the light-emitting surface 33 in this embodiment. The diffusion pattern can be a strip diffusion pattern or a corn kernel diffusion pattern. The light energy utilizes the diffusion of the optical pattern to achieve a uniform lighting effect and maximize the utilization rate of light energy.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above specific embodiments further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A car logo light, characterized in that: The device includes a housing (5) and a lampshade (6) that are assembled together to form a receiving space. A PCB board (1) is disposed near the housing (5) in the receiving space. A light-diffusing plate (4) is disposed near the lampshade (6) in the receiving space. A light guide plate (3) is disposed between the PCB board (1) and the light-diffusing plate (4). The PCB board (1) is provided with a plurality of LED light sources (2). The main body of the light guide plate (3) has a collimating spherical surface (31) formed on the side of the PCB board (1) and facing the LED light source (2). The main body of the light guide plate (3) has a reflective arc surface (32) formed on the side of the main body away from the PCB board (1) and on the back side of the collimating spherical surface (31). The end of the light guide plate (3) away from the main body has a light-emitting surface (33). The lampshade (6) includes a non-transparent layer (61) and a transparent layer (62) distributed at intervals. The position of the transparent layer (62) corresponds to the main body of the light guide plate (3) and the light-emitting surface (33).

2. The car logo light according to claim 1, characterized in that: The number of the collimating spherical surface (31), the reflective arc surface (32), and the LED light source (2) are equal.

3. The car logo light according to claim 1, characterized in that: The light-transmitting layer (62) includes a region A that adapts to the shape of the LOGO light and a region B that adapts to the outline. Region A corresponds to the main body of the light guide plate (3) and region B corresponds to the light-emitting surface (33) of the light guide plate (3).

4. The car logo light according to claim 1, characterized in that: The main body of the light guide plate (3) and the light-emitting surface (33) are connected and transitioned by an arc-shaped light guide structure (36).

5. A car logo light according to claim 1, characterized in that: The light guide plate (3) is also provided with a diffusion structure (34) located between the reflective arc surfaces (32).

6. A car logo light according to claim 5, characterized in that: The diffusion structure (34) is a through-hole hollow structure.

7. A car logo light according to claim 6, characterized in that: The diffusion structure (34) is surrounded by diffusion patterns.

8. A car logo light according to claim 1, characterized in that: The lampshade (6) has multiple welding ribs (63) on its inner side, and the light-diffusing plate (4) has multiple welding planes (41) on the side near the lampshade (6). The welding ribs (63) and the welding planes (41) are welded together in a one-to-one correspondence.

9. A car logo light according to claim 1, characterized in that: The light-emitting surface (33) is provided with a diffusion pattern.

10. A car logo light according to claim 1, characterized in that: The surface of the light-diffusing plate (4) is textured.

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