Light guide structure and vehicle lamp with same

Abstract

The utility model relates to the field of car lamps, in particular to a light guide structure and a car lamp with the same. The light guide structure comprises a light guide plate and a backlight support which are arranged in a stacked mode, the backlight support is located on the inner side of the light guide plate and used for absorbing light, the two adjacent faces of the light guide plate are provided with an incident face and a first emergent face respectively, and the first emergent face is arranged on the surface, away from the backlight support, of the light guide plate. The first emergent surface is provided with a plurality of first patterns which are distributed in an array mode, the part, except the first patterns, of the first emergent surface is provided with a first total reflection area, light rays are diffused out from the first patterns to form a first bright area, and the light rays are totally reflected in the first total reflection area to form a first dark area. According to the light guide structure, the first patterns and the first total reflection areas are arranged on the emergent face of the light guide plate, the light and shade alternated array type lightening effect is formed, light is absorbed through the backlight support, reflected light and stray light are reduced, definition is improved, and cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting, and in particular to a light guide structure and a vehicle lighting having the same. Background Technology

[0002] Existing automotive signal lights typically rely on complex processes such as dual-color injection molding, laser engraving, or grayscale displays to achieve array-like lighting effects. Dual-color injection molding, with its strict requirements for structural space and color, easily restricts design freedom. Because it requires specialized dual-color molds, weld lines are generated at each hole after injection molding, affecting appearance quality, leading to low product yield, material waste, and increased costs. Laser engraving requires precise control over the angles and surface masking of the shaped surfaces. The complex process involves two steps: painting after injection molding and laser engraving. This can easily result in problems such as incomplete plating, scratches, and uneven shape boundaries, leading to poor product consistency. Grayscale displays, due to their grayscale design, cannot meet the regulatory requirements for functional signal lights and are only suitable for non-functional scenarios such as welcomes and farewells.

[0003] In summary, while the above solutions can achieve array-style lighting effects, they have high production costs. Utility Model Content

[0004] The purpose of this invention is to provide a light guide structure and a vehicle lamp having the same structure, which achieves an array-style lighting effect while saving costs.

[0005] To achieve the above objectives, this utility model proposes a light guide structure, including a light guide plate and a backlight bracket stacked together. The backlight bracket is located inside the light guide plate and is used to absorb light. Two adjacent surfaces of the light guide plate are respectively provided with an incident surface and a first exit surface. The first exit surface is provided on the surface of the light guide plate away from the backlight bracket. The first exit surface is provided with a plurality of first patterns distributed in an array. The portion outside the first patterns of the first exit surface is provided with a first total reflection area. Light diffuses out from the first patterns to form a first bright area, and undergoes total reflection in the first total reflection area to form a first dark area.

[0006] Optionally, the surface of the light guide plate near the backlight bracket is provided with a second emitting surface. The second emitting surface is provided with a plurality of second patterns arranged in an array. The part outside the second patterns of the second emitting surface is provided with a second total reflection area. Light diffuses out from the second patterns to form a second bright area, and undergoes total reflection in the second total reflection area to form a second dark area.

[0007] Optionally, the light guide plate includes a main plate disposed opposite to the backlight bracket and a folding plate disposed at the end of the main plate, the incident surface being disposed on the end face of the main plate, and the light guide plate being fixedly connected to the backlight bracket through the folding plate.

[0008] The backlight bracket includes a backlight panel and a mounting part located at the end of the backlight panel. The backlight panel is attached to the main body panel, and the light guide plate is fixedly connected to the backlight panel through the mounting part.

[0009] The mounting section includes a first mounting plate and a second mounting plate located at two opposite ends of the backlight panel. The folding plate is fixedly connected to the first mounting plate, and the end of the main plate away from the folding plate abuts against the second mounting plate.

[0010] The mounting section also includes a limiting plate disposed opposite to the backlight panel. The limiting plate, the second mounting plate, and the backlight panel together form a snap-fit ​​groove, and one end of the main body plate is disposed in the snap-fit ​​groove.

[0011] This utility model proposes a vehicle lamp, including the above-mentioned light guide structure.

[0012] The vehicle light of this utility model includes a light source assembly located on the side of the incident surface away from the light guide plate. The light source assembly is fixedly connected to the backlight bracket. The light source assembly includes a circuit board and an array of light sources fixedly connected to the circuit board.

[0013] The vehicle light of this utility model includes a light shield that is fixedly connected to the backlight bracket, and a light guide plate is located between the backlight bracket and the light shield.

[0014] The light shield includes a first light shield and a second light shield that are connected to each other and respectively disposed opposite to the light guide plate and the circuit board.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages: The light guide structure of this utility model forms an array-like lighting effect with alternating light and dark by setting a first pattern and a first total reflection area on the output surface of the light guide plate. The backlight bracket absorbs light, reduces reflected light and stray light, improves clarity, and saves costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the vehicle lamp of this utility model.

[0018] Figure 2 This is a partially exploded view of the vehicle headlight of this utility model.

[0019] Figure 3 This is a cross-sectional view of the vehicle headlight of this utility model.

[0020] Figure 4 This is a schematic diagram of the optical path of the vehicle lamp of this utility model.

[0021] In the picture:

[0022] 1-Light guide plate; 11-Main plate; 12-Folding plate; 13-Connecting plate; 121-Incident surface; 122-First exit surface; 123-Second exit surface; 111-First pattern; 112-Second pattern; 113-First total reflection area; 114-Second total reflection area;

[0023] 2-Backlight bracket; 21-Backlight panel; 22-Mounting part; 221-First mounting plate; 222-Second mounting plate; 223-Limiting plate;

[0024] 3-Light source assembly; 31-Circuit board; 32-Array light source;

[0025] 4-Light shield; 41-First light shield; 42-Second light shield. Detailed Implementation

[0026] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0027] The terms “upper,” “lower,” “top,” “bottom,” “inner,” and “outer” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product is usually placed in during use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The terms “first”, “second”, etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0029] The terms “including,” “comprising,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] Please see Figure 1 and Figure 2This utility model provides a vehicle light, including a light guide structure, a light source assembly 3, and a light shield 4. The light guide structure includes a light guide plate 1 and a backlight bracket 2, and the light guide plate 1, the light source assembly 3, and the light shield 4 are all fixedly connected to the backlight bracket 2. In one example, the light source assembly 3 is located above the light guide plate 1 along the height direction of the vehicle and is electrically connected to the main wiring harness of the vehicle via a connector. A portion of the light guide plate 1 is located between the backlight bracket 2 and the light shield 4, and a portion of the light shield 4 is located on the side of the light source assembly 3 corresponding to the light guide plate 1.

[0031] Please combine Figure 3 In some embodiments, the light guide plate 1 and the backlight bracket 2 are stacked along the front-to-back direction of the vehicle. The backlight bracket 2 is located inside the light guide plate 1 and is used to absorb light. The light guide plate 1 is preferably injection molded from a single-color, transparent optical-grade plastic or similar material. Compared with two-color injection molding, this simplifies the process, reduces mold costs, and improves product yield. Optionally, the backlight bracket 2 can be fixedly connected to the lamp housing by at least one of the following methods: snap-fit, fastener connection, and adhesive bonding.

[0032] In one example, two adjacent surfaces of the light guide plate 1 are provided with an incident surface 121 and a first exit surface 122. The incident surface 121 is located on the end face of the light guide plate 1, and the first exit surface 122 is located on the surface of the light guide plate away from the backlight bracket 2. Specifically, the first exit surface 122 is provided with a plurality of first patterns 111 arranged in an array. The portion of the first exit surface 122 outside the first patterns 111 is provided with a first total reflection area 113. Light diffuses out from the first patterns 111 to form a first bright area, and undergoes total reflection in the first total reflection area 113 to form a first dark area, thereby achieving an array-like lighting effect with alternating bright and dark areas.

[0033] In another example, the surface of the light guide plate 1 near the backlight bracket 2 is also provided with a second emitting surface 123. The second emitting surface 123 is provided with a plurality of second patterns 112 arranged in an array. The part of the second emitting surface 123 outside the second patterns 112 is provided with a second total reflection area 114. Light diffuses out from the second patterns 112 to form a second bright area, and undergoes total reflection in the second total reflection area 114 to form a second dark area. While achieving an array-like lighting effect with alternating bright and dark areas, the second patterns 112, together with the first patterns 111, can achieve a floating lighting effect.

[0034] Optionally, the line connecting the geometric center of the first pattern 111 and the geometric center of the second pattern 112 is approximately parallel to the thickness direction of the guide plate 1. The first pattern 111 and the second pattern 112 are preferably integrally injection molded on the light guide plate 1, which is suitable for mass production, and the materials are simple, with no subsequent processing steps, thereby improving production efficiency.

[0035] In one example, the light guide plate 1 includes a main plate 11 and a folding plate 12 disposed at the end of the main plate 11. The main plate 11 and the folding plate 12 generally form an L-shaped structure. The incident surface 121 is disposed on the end face of the main plate 11, and the first exiting surface 122 and the second exiting surface 123 are respectively disposed on the surfaces of the main plate 11 opposite to and away from the backlight bracket 2. The light guide plate 1 is fixedly connected to the backlight bracket 2 through the folding plate 12. Optionally, the folding plate 12 is fixedly connected to the backlight bracket 2 by at least one of snap-fit ​​and fastener connection.

[0036] Optionally, the light guide plate 1 is set at an angle of 5 to 15° with the height direction of the vehicle. In this example, the light guide plate 1 is also provided with a connecting plate 13. The connecting plate 13 is integrally connected to the end of the main plate 11 away from the folding plate 12 and is bent downward relative to the main plate 11. The connecting plate 13 and the main plate 11 are preferably set at an angle of 165 to 175° to facilitate installation.

[0037] In one example, the light source assembly 3 includes a circuit board 31 and an array of light sources 32 disposed on the circuit board 31. In one example, a plurality of array light sources 32 are spaced apart along the length direction of the circuit board 31, i.e., the width direction of the vehicle, and are opposite to the incident surface 121 of the light guide plate 1. Optionally, the circuit board 31 is fixedly connected to the backlight bracket 2 by means of fastener connection or riveting, and the array light sources 32 are fixed to the circuit board 31 by welding.

[0038] By using the light guide plate 1 in conjunction with the position of the array light source 32, an array-style lighting effect can be achieved. Compared with solutions such as dual-color injection molding, spray painting and laser engraving, or grayscale screens, this method can reduce costs, simplify the process, and improve product consistency.

[0039] Please see Figure 4 Specifically, by arranging the positions of the array light sources 32 and coordinating them with the position and thickness of the light guide plate 1, as well as the positions of the first pattern 111 and the second pattern 112 closest to the light source assembly 3 (i.e., the uppermost first pattern 111 and the second pattern 112), the path of the light emitted by each array light source 32 is adjusted. This ensures that the light undergoes total internal reflection in the areas of the first total internal reflection zone 113 and the second total internal reflection zone 114, and cannot be emitted from the left and right sides of the light guide plate 1, forming a closed light path loop. This creates a first dark area and a second dark area on the two opposite surfaces of the light guide plate 1, respectively. At the positions of the first pattern 111 and the second pattern 112, the light is refracted by setting the angle of the light distribution structure, and diffuses from the areas where the first pattern 111 and the second pattern 112 are located into the air, forming a first bright area and a second bright area, respectively. Furthermore, by absorbing the light through the backlight bracket 2, an array-like lighting effect with alternating light and dark can be presented. Moreover, the first bright area and the second bright area formed by the first pattern 111 and the second pattern 112 can simultaneously present a floating lighting effect.

[0040] In some embodiments, the backlight bracket 2 includes a backlight plate 21 and a mounting portion 22. The light guide plate 1 is fixedly connected to the backlight plate 21 through the mounting portion 22. The backlight plate 21 is attached to the main body plate 11 and is used to absorb the light emitted by the light guide plate 1, thereby reducing reflected light or stray light.

[0041] Specifically, the backlight panel 21 is preferably made of black or other dark-colored material, which can absorb most of the light in the visible spectrum, thereby reducing reflected light and stray light. In addition, the dark backlight panel 21 can block some light other than the array light source 32, which is beneficial to the color display of vehicle lights such as signal lights, avoids interference from ambient light, and enhances clarity.

[0042] Optionally, the backlight panel 21 may have a matte surface, a textured surface, or an anti-reflective coating, which facilitates light penetration into the material, reduces reflection, and further increases light absorption performance. Alternatively, the backlight panel 21 may be made of a material with high light absorption, such as a black velvet surface, to absorb light.

[0043] During installation, the backlight panel 21 is tightly fitted to the light guide plate 1 to avoid reflections caused by air gaps. However, due to limitations in material properties, manufacturing processes, or installation precision, the backlight panel 21 cannot completely absorb light. The light diffused from the second pattern 112 can reflect weak light in the area of ​​the backlight panel 21 near the second pattern 112. When viewed directly, the light diffused through the light guide plate 1 presents an array-like light-emitting effect. When viewed from the side, the light diffused from the first pattern 111, combined with the light diffused from the second pattern 112, can present a floating lighting effect.

[0044] Please continue reading. Figure 3 In some embodiments, the mounting portion 22 includes a first mounting plate 221 and a second mounting plate 222 disposed at two opposite ends of the backlight panel 21. The folding plate 12 and the connecting plate 13 of the light guide plate 1 are fixedly connected to the first mounting plate 221 and the second mounting plate 222 by at least one of snap-fit ​​and fastener connection. Optionally, the folding plate 12 is fixedly connected to the first mounting plate 221 by fastener connection, and the end of the main body plate 11 away from the folding plate 12 abuts against the second mounting plate 222.

[0045] Furthermore, the mounting portion 22 also includes a limiting plate 223 connected to the end of the second mounting plate 222 away from the backlight plate 21, with the limiting plate 223 disposed opposite to the backlight plate 21. In one example, the limiting plate 223 is integrally connected to the end of the second mounting plate 222 away from the backlight plate 21, used to limit the relative position between the main body plate 11 and the backlight plate 21. Understandably, the limiting plate 223 can also be fixedly connected to the end of the second mounting plate 222 away from the backlight plate 21 by at least one of snap-fit, fastener connection, or adhesive bonding. The enclosure of the limiting plate 223, the second mounting plate 222, and the backlight plate 21 forms a snap-fit ​​groove, with one end of the main body plate 11 disposed within the snap-fit ​​groove. Specifically, the connecting plate 13 of the light guide plate 1 snaps into the snap-fit ​​groove, and the folding plate 12 of the light guide plate 1 is fixedly connected to the first mounting plate 221 by fastener connection, facilitating installation and improving connection reliability.

[0046] The light shield 4 includes a first light shield 41 and a second light shield 42 fixedly connected to each other. The first light shield 41 and the second light shield 42 generally form an L-shaped structure, and the first light shield 41 and the second light shield 42 are respectively arranged opposite to the light guide plate 1 and the circuit board 31. Specifically, the first light shield 41 is located on the side of the light source assembly 3 corresponding to the emission surface, and the second light shield 42 is located on the side of the light guide plate 1 away from the backlight plate 21. A part of the light guide plate 1 is located between the light shield 4 and the circuit board 31. The light shield 4 can prevent light leakage or light crosstalk, and can block stray light, improve clarity, and facilitate the presentation of the lighting effect.

[0047] The light guiding structure of this utility model controls the distribution of light through the first total reflection area 113 and the second total reflection area 114, guides the light to the first pattern 111 and the second pattern 112, and diffuses it out from the first pattern 111 and the second pattern 112 to form an array-like lighting effect with alternating light and dark, and the first pattern 111 and the second pattern 112 present a floating lighting effect.

[0048] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A light guiding structure, characterized in that: The light guide plate (1) and backlight bracket (2) are stacked together. The backlight bracket (2) is located inside the light guide plate (1) and is used to absorb light. The two adjacent surfaces of the light guide plate (1) are respectively provided with an incident surface (121) and a first exit surface (122). The first exit surface (122) is provided on the surface of the light guide plate (1) away from the backlight bracket (2). The first exit surface (122) is provided with a plurality of first patterns (111) arranged in an array. The part of the first exit surface (122) outside the first pattern (111) is provided with a first total reflection area (113). Light diffuses out from the first pattern (111) to form a first bright area, and undergoes total reflection in the first total reflection area (113) to form a first dark area.

2. The light guide structure according to claim 1, characterized in that: The light guide plate (1) has a second emitting surface (123) on the surface near the backlight bracket (2). The second emitting surface (123) has a plurality of second patterns (112) arranged in an array. The part of the second emitting surface (123) outside the second patterns (112) has a second total reflection area (114). Light diffuses out from the second patterns (112) to form a second bright area, and undergoes total reflection in the second total reflection area (114) to form a second dark area.

3. The light guide structure according to claim 1, characterized in that: The light guide plate (1) includes a main plate (11) disposed opposite to the backlight bracket (2) and a folding plate (12) disposed at the end of the main plate (11). The incident surface (121) is disposed on the end face of the main plate (11). The light guide plate (1) is fixedly connected to the backlight bracket (2) through the folding plate (12).

4. The light guide structure according to claim 3, characterized in that: The backlight bracket (2) includes a backlight plate (21) and a mounting part (22) located at the end of the backlight plate (21). The backlight plate (21) is attached to the main body plate (11), and the light guide plate (1) is fixedly connected to the backlight plate (21) through the mounting part (22).

5. The light guide structure according to claim 4, characterized in that: The mounting part (22) includes a first mounting plate (221) and a second mounting plate (222) located at two opposite ends of the backlight plate (21). The folding plate (12) is fixedly connected to the first mounting plate (221), and the end of the main plate (11) away from the folding plate (12) abuts against the second mounting plate (222).

6. The light guide structure according to claim 5, characterized in that: The mounting part (22) further includes a limiting plate (223) disposed opposite to the backlight plate (21). The limiting plate (223), the second mounting plate (222) and the backlight plate (21) form a snap-fit ​​groove, and one end of the main body plate (11) is disposed in the snap-fit ​​groove.

7. A vehicle light, characterized in that: Includes the light guide structure described in any one of claims 1 to 6.

8. The vehicle light according to claim 7, characterized in that: The light source assembly (3) is located on the side of the incident surface (121) away from the light guide plate (1). The light source assembly (3) is fixedly connected to the backlight bracket (2). The light source assembly (3) includes a circuit board (31) and an array of light sources (32) fixedly connected to the circuit board (31).

9. The vehicle lamp according to claim 8, characterized in that: Includes a light shield (4) fixedly connected to the backlight bracket (2), and the light guide plate (1) is located between the backlight bracket (2) and the light shield (4).

10. The vehicle lamp according to claim 9, characterized in that: The light shield (4) includes a first light shield (41) and a second light shield (42) that are connected to each other and are respectively disposed opposite to the light guide plate (1) and the circuit board (31).

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