Thick-wall light guide light-emitting device for automobile tail lamp

Abstract

The utility model relates to a thick-wall light guide light-emitting device for an automobile tail lamp, which comprises a light-emitting element and a thick-wall light guide optically coupled to the light-emitting element. The thick-wall light guide comprises a light inlet face right facing the light-emitting element, reflection patterns arranged on the inner surface of the thick-wall light guide and used for controlling a light ray propagation path and a light outlet area arranged on the outer surface of the thick-wall light guide, the light outlet area is provided with at least two refraction pattern areas, and the refraction pattern areas are provided with refraction units. The light emitting area is used for directionally refracting light rays incident to the refraction pattern area, the light emitting area further comprises at least one modeling pattern area forming a preset pattern, more efficient light ray distribution control is achieved by reasonably arranging reflection patterns and refraction patterns, it is ensured that the light rays can be accurately emitted according to the preset direction and angle, and the lighting effect is improved; the final brightness output is enhanced, the preset light-emitting pattern is formed, and the uniqueness and the layering sense of the design are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a thick-walled light guide light-emitting device for automotive taillights. Background Technology

[0002] With the rapid development of the automotive industry, the design requirements for automotive lighting are constantly increasing. In addition to the basic safety lighting function, modern automotive lighting also needs to have the characteristics of aesthetics and high efficiency.

[0003] In automotive taillight design, the application of thick-walled light guides is becoming increasingly widespread, such as... Figure 7 The existing light-emitting structure shown employs a full-area refractive pattern light control scheme. In this design, the light emitted by the LED light source is first adjusted into a parallel beam by the reflective pattern. The adjusted light then passes through the refractive pattern, which further directionally refracts the light, causing it to emerge in a predetermined direction and angle to meet light distribution standards. However, although this scheme performs well in guiding the light direction, it has some significant limitations and shortcomings in practical applications. When the light passes through the refractive pattern, multiple scattering and interface loss occur, resulting in a significant loss of light energy. This not only reduces the overall luminous efficiency but also affects the final brightness output. Furthermore, because the entire light-emitting surface uses a refractive pattern, the light is evenly dispersed across the entire surface, forming a uniform sheet-like light-emitting effect. While this visual effect can meet basic functional requirements, it lacks a sense of layering and design uniqueness. For modern automobiles that pursue personalized design, this monotonous light-emitting method obviously cannot meet market demands. Utility Model Content

[0004] This invention aims to solve the problems existing in the prior art by providing a thick-walled light guide light-emitting device for automobile taillights that improves light utilization, has a light-emitting pattern, and reduces unnecessary energy loss by optimizing the internal structure of the light guide.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This thick-walled light guide light-emitting device for automotive taillights includes a light-emitting element and a thick-walled light guide optically coupled to the light-emitting element. The thick-walled light guide includes a light-incoming surface facing the light-emitting element, a reflective pattern disposed on the inner surface of the thick-walled light guide for controlling the light propagation path, and a light-emitting area disposed on the outer surface of the thick-walled light guide. The light-emitting area is provided with at least two refractive pattern areas, and each refractive pattern area has a refractive unit for directional refraction of light incident on the refractive pattern area.

[0006] The light-emitting area also includes at least one patterned area forming a preset pattern. Light reflected from the patterned area is directly transmitted out of the light-emitting area to form a preset luminous pattern.

[0007] The patterned area is located between the two refractive patterned areas, and the three are distributed at intervals on the light-emitting area to achieve the required light distribution and preset luminous pattern display.

[0008] Preferably, the thick-walled light guide has a focusing frame surrounding the refractive pattern area and the decorative pattern area. The focusing frame includes an upper focusing surface located on the upper end of the light-emitting area facing downwards and adjacent to the upper end of the decorative pattern, a lower focusing surface located on the lower end of the light-emitting area facing upwards and adjacent to the lower end of the decorative pattern, a left focusing surface located on the left side of the light-emitting area and connected to the leftmost refractive pattern area, and a right focusing surface located on the right side of the light-emitting area and connected to the rightmost refractive pattern area.

[0009] Preferably, the patterned area is composed of three thin light strips, and the ends of the three thin light strips are connected to form a horizontal "Y"-shaped structure along the length of the thick-walled light guide. The upwardly inclined thin light strip in the patterned area is connected to the upper light-gathering surface of the light-gathering frame, and the downwardly inclined thin light strip in the patterned area is connected to the lower light-gathering surface of the light-gathering frame.

[0010] Preferably, the patterned area has a first light-emitting surface arranged along the length direction of the thick-walled light guide, and the light reflected from the pattern to the patterned area is transmitted through the first light-emitting surface.

[0011] Preferably, the refractive pattern area includes a plurality of refractive units arranged in an array within the light-concentrating frame along the length of the thick-walled light guide. Each refractive unit includes a longitudinal side light surface facing the taillight and a second light-emitting surface that transmits light directly in front of the taillight. The longitudinal side light surface and the second light-emitting surface in adjacent refractive units are connected sequentially from front to back to form a first stepped structure.

[0012] Preferably, the longitudinal side light surface in the refractive unit is tilted to the left synchronously with the second light-emitting surface, and a reflection angle is formed between the side light surface and the second light-emitting surface.

[0013] Preferably, the longitudinal side light surface and the second light-emitting surface of the refractive unit adjacent to each other along the height direction of the thick-walled light guide are connected from top to bottom to form a second stepped structure.

[0014] Preferably, the upwardly inclined thin strip light plate in the patterned area forms a first focusing angle with the upper focusing surface of the focusing frame, and the downwardly inclined thin strip light plate in the patterned area forms a second focusing angle with the lower focusing surface of the focusing frame. The angle of the second focusing angle is greater than the angle of the first focusing angle, so that the first light-emitting surface is inclined along the height direction of the thick-walled light guide.

[0015] Preferably, the height of the refractive unit along the width direction of the thick-walled light guide is higher than the height of the patterned area along the width direction of the thick-walled light guide.

[0016] Preferably, it also includes a lower support plate connected to the thick-walled light guide and surrounding the reflective pattern, and an upper support plate connected above the thick-walled light guide for mounting the light-emitting element.

[0017] The beneficial effects of this utility model are as follows: By rationally arranging reflective and refractive patterns, this utility model achieves more efficient light distribution control, ensuring that light can be accurately emitted in a predetermined direction and angle, thus improving the lighting effect. Moreover, since there are no refractive patterns in the patterned areas, light can be directly transmitted from these areas, reducing energy loss caused by multiple refractions. This not only improves the overall light effect and enhances the final brightness output, but also forms a preset luminous pattern, increasing the uniqueness and sense of layering of the design. Attached Figure Description

[0018] Figure 1 This is the front view of the thick-walled light guide light-emitting device used in automotive taillights;

[0019] Figure 2 This is a schematic diagram of the structure of the thick-walled light guide light-emitting device used in automotive taillights.

[0020] Figure 3 This is a rear view of the thick-walled light guide light-emitting device used in automotive taillights.

[0021] Figure 4 for Figure 1 Sectional view at point AA;

[0022] Figure 5 for Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 6 for Figure 2 A magnified view of a section at point B in the middle;

[0024] Figure 7 This is a schematic diagram of an existing thick-walled optical guide.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Light-emitting element;

[0027] 2. Thick-walled light guide; 20. Reflective pattern; 21. Light-entry surface; 22. Light-exiting area; 23. Refraction pattern area; 24. Refraction unit; 25. Patterned area; 26. Focusing frame; 200. Upper focusing surface; 201. Lower focusing surface; 202. Left focusing surface; 203. Right focusing surface; 204. Thin strip light plate; 205. First light-exiting surface; 206. Longitudinal side light surface; 207. Second light-exiting surface; 208. First focusing angle; 209. Second focusing angle;

[0028] 3. Lower support plate;

[0029] 4. Upper support plate. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0031] like Figures 1 to 6 As shown, a thick-walled light guide light-emitting device for automotive taillights includes a light-emitting element 1 and a thick-walled light guide 2 optically coupled to the light-emitting element 1. The thick-walled light guide 2 includes a light-incoming surface 21 facing the light-emitting element 1, a reflective pattern 20 disposed on the inner surface of the thick-walled light guide 2 for controlling the light propagation path, and a light-emitting area 22 disposed on the outer surface of the thick-walled light guide 2. The light-emitting area 22 is provided with at least two refractive pattern areas 23. The refractive pattern areas 23 have refractive units 24 for directional refraction of light incident on the refractive pattern areas 23. The light-emitting area 22 also includes at least one shaped pattern area 25 forming a preset pattern. Light reflected from the reflective pattern 20 to the shaped pattern area 25 is directly transmitted out of the light-emitting area 22 to form a preset light-emitting pattern. The shaped pattern area 25 is located between the two refractive pattern areas 23. The three are distributed at intervals on the light-emitting area 22 to achieve the required light distribution and the display of the preset light-emitting pattern.

[0032] The light-emitting element 1 is an LED lamp. A light-receiving surface 21 is provided above the thick-walled light guide 2, facing the light-emitting element 1, to receive the light emitted by the LED light source. The inner surface of the thick-walled light guide 2 is provided with a reflective pattern 20 to control the propagation path of light within the light guide. The outer surface is provided with a light-emitting area 22, on which at least two refractive pattern areas 23 are provided. Each area consists of multiple refractive units 24, used to directionally refract the light incident upon it, thereby achieving precise control of the light distribution direction. In this embodiment, the light-emitting area 22 is also provided with at least one patterned area 25, which does not have a refractive structure; the reflective pattern 20 will... After the light is directly guided to the patterned area 25, the light can be directly transmitted out of the light-emitting area 22, thereby forming a preset light-emitting pattern. The patterned area 25 and the refractive patterned area 23 are arranged alternately on the light-emitting area 22. The two refractive patterned areas (23) are distributed on both sides of the patterned area 25. The refractive patterned areas 23 on both sides can help the patterned area 25 to better focus the light. The patterned area 25 and the refractive patterned area 23 work together to reduce the energy loss caused by multiple refractions, improve the overall light efficiency, meet the technical requirements for light distribution, realize a patterned light-emitting effect with visual recognition, and enhance the aesthetics and brand recognition of the taillight.

[0033] Specifically, such as Figure 1 and Figure 2 As shown, the thick-walled light guide 2 has a focusing frame 26 forming around the refractive pattern area 23 and the shaped pattern area 25. The focusing frame 26 includes an upper focusing surface 200 located on the upper end face of the light-emitting area 22 facing downward and adjacent to the upper end of the shaped pattern, a lower focusing surface 201 located on the lower end face of the light-emitting area 22 facing upward and adjacent to the lower end of the shaped pattern, a left focusing surface 202 located on the left side of the light-emitting area 22 and connected to the leftmost refractive pattern area, and a right focusing surface 203 located on the right side of the light-emitting area 22 and connected to the rightmost refractive pattern area.

[0034] A focusing frame 26 is provided outside the thick-walled light guide 2. This frame surrounds the refractive pattern area 23 and the decorative pattern area 25, serving the dual purpose of enhancing light guiding efficiency and structural stability. The focusing frame 26 includes an upper focusing surface 200, a lower focusing surface 201, a left focusing surface 202, and a right focusing surface 203. The upper focusing surface 200 is located on the upper end surface of the light-emitting area 22 and faces downward, adjacent to the upper end of the decorative pattern area 25 and the refractive pattern area 23; the lower focusing surface 201 ...3 and the refractive pattern area 25. Located on the lower end face of the light-emitting area 22 and facing upwards, it is adjacent to the lower ends of the patterned area 25 and the refractive patterned area 23; the left focusing surface 202 is connected to the leftmost refractive patterned area 23, and the right focusing surface 203 is connected to the rightmost refractive patterned area 23. This structure can effectively improve the utilization efficiency of light in the light-emitting area 22 and reduce light energy loss through the reflection and focusing of light, while enhancing the luminous brightness of the patterned area 25 and the light control capability of the refractive patterned area 23.

[0035] Furthermore, such as Figure 1 , Figure 2 and Figure 6 As shown, the patterned area is composed of three thin light strips 204. The ends of the three thin light strips 204 that are close to each other are connected to form a horizontal "Y"-shaped structure along the length of the thick-walled light guide 2. The upwardly inclined thin light strip 204 in the patterned area is connected to the upper light-gathering surface 200 of the light-gathering frame 26, and the downwardly inclined thin light strip 204 in the patterned area is connected to the lower light-gathering surface 201 of the light-gathering frame 26.

[0036] The patterned area 25 is composed of three thin light strips 204. The three thin light strips 204 are connected at their closest ends to form a horizontal "Y"-shaped structure along the length of the thick-walled light guide 2. This structure not only has good optical guiding performance, but also has a unique visual effect, which can form a recognizable luminous pattern. In the patterned area 25, the upward-sloping thin light strips 204 are connected to the upper light-concentrating surface 200 of the light-concentrating frame 26, while the downward-sloping thin light strips 204 are connected to the lower light-concentrating surface 201. Through the reflection effect of the light-concentrating surface, more light is concentrated and directed to the patterned area 25, thereby improving its luminous intensity and pattern clarity, ensuring efficient light emission of the patterned area, enhancing the stability of the overall structure and the light utilization rate, and improving the lighting performance and aesthetic appearance of the taillight.

[0037] Furthermore, such as Figure 1 , Figure 2 and Figure 6 As shown, the patterned area has a first light-emitting surface 205 arranged along the length of the thick-walled light guide 2, and the light reflected from the reflective pattern 20 to the patterned area 25 is transmitted through the first light-emitting surface 205.

[0038] The patterned area 25 has a first light-emitting surface 205 arranged along the length of the thick-walled light guide 2. The first light-emitting surface 205 is a flat surface without a refractive pattern. After the reflective pattern 20 guides the light to this area, the light is directly transmitted out from the first light-emitting surface 205. This design avoids energy loss caused by multiple refractions and ensures that the light can pass through the patterned area 25 efficiently to form a preset light-emitting pattern.

[0039] Specifically, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the refractive pattern area 23 includes several refractive units 24 arranged in an array along the length of the thick-walled light guide 2 within the light-concentrating frame 26. Each refractive unit 24 includes a longitudinal side light surface 206 facing the side of the taillight and a second light-emitting surface 207 that transmits light directly in front of the taillight. The longitudinal side light surface 206 and the second light-emitting surface 207 in adjacent refractive units 24 are connected sequentially from front to back to form a first stepped structure.

[0040] Each refractive unit 24 includes a longitudinal side light surface 206 facing the side of the taillight and a second light-emitting surface 207 that transmits light directly in front of the taillight. The longitudinal side light surface 206 and the second light-emitting surface 207 in adjacent refractive units 24 are connected sequentially from front to back to form a first stepped structure. This array structure helps to precisely control the direction of light, expand the angle at which the user observes the headlights, and achieve efficient light distribution.

[0041] Furthermore, such as Figure 4 and Figure 5 As shown, the longitudinal side light surface 206 and the second light-emitting surface 207 in the refraction unit 24 are tilted to the left in sync, and a reflection angle is formed between the side light surface and the second light-emitting surface 207.

[0042] The longitudinal side light surface 206 and the second light-emitting surface 207 in the refraction unit 24 are tilted to the left in sync, forming a reflection angle between them. The light emitted from the second light-emitting surface 207 is focused by the longitudinal side light surface 206, so that the entire taillight looks like individual corn kernels instead of a blurry mess. This optimizes the propagation path of light inside the refraction unit 24, reduces interface loss, and improves light output efficiency through a specific angle configuration, allowing the light to be directed more accurately in the predetermined direction, thus improving the overall lighting effect.

[0043] Furthermore, such as Figures 4 to 6 As shown, the longitudinal side light surface 206 and the second light-emitting surface 207 of the refraction unit 24 adjacent to each other along the height direction of the thick-walled light guide 2 are connected from top to bottom to form a second stepped structure.

[0044] Along the height direction of the thick-walled light guide 2, the longitudinal side light surface 206 and the second light-emitting surface 207 in the adjacent refractive unit 24 are connected from top to bottom to form a second stepped structure. This design further enhances the directional control capability of light, ensures that light can be effectively utilized at different height levels, and improves the uniformity of the overall light distribution.

[0045] Furthermore, such as Figure 1 , Figure 2 and Figure 6 As shown, the upwardly inclined thin strip light plate 204 in the patterned area forms a first focusing angle 208 with the upper focusing surface 200 of the focusing frame 26, and the downwardly inclined thin strip light plate 204 in the patterned area forms a second focusing angle 209 with the lower focusing surface 201 of the focusing frame 26. The angle of the second focusing angle 209 is greater than the angle of the first focusing angle 208, so that the first light-emitting surface 205 is inclined along the height direction of the thick-walled light guide 2.

[0046] The angle of the second focusing angle 209 is greater than that of the first focusing angle 208, so that the first light-emitting surface 205 is inclined along the height direction of the thick-walled light guide 2, so as to adapt to the second stepped structure in which the longitudinal side light surface 206 and the second light-emitting surface 207 in the adjacent refraction unit 24 are connected from top to bottom. By adjusting the focusing angle, more light is effectively concentrated to the pattern area 25, improving its luminous intensity and clarity, while enhancing the stability and aesthetics of the overall structure.

[0047] Specifically, such as Figure 2 and Figure 5 As shown, the height of the refractive unit 24 along the width direction of the thick-walled light guide 2 is higher than the height of the patterned area along the width direction of the thick-walled light guide 2.

[0048] The height of the refractive unit 24 along the width direction (thickness direction) of the thick-walled light guide 2 is higher than the height of the patterned area along the same direction. This makes the patterned area 25 appear to be embedded in the two adjacent refractive areas 23. This design ensures that the refractive unit 24 can better control the direction and intensity of the light, while the patterned area 25 focuses the light to provide high-brightness direct transmitted light, forming a clear functional division and improving the overall light effect and visual effect.

[0049] Specifically, such as Figures 2 to 4 As shown, it also includes a lower support plate 3 connected to the thick-walled light guide 2 and surrounding the reflective pattern 20, and an upper support plate 4 connected above the thick-walled light guide 2 for mounting the light-emitting element 1.

[0050] A connecting hole is provided at the tail end of the thick-walled light guide 2, and a corresponding threaded hole is provided at the tail end of the lower support plate 3. After the connecting hole and the threaded hole are aligned, the lower support plate 3 and the thick-walled light guide 2 are fixed together by bolts. The lower support plate 3 surrounds the reflective pattern 20 of the reflective pattern 20 to concentrate the light source. A boss-type connecting post is provided on the top of the thick-walled light guide 2, and a mounting hole is provided on the upper support plate 4. The connecting post is inserted into the mounting hole, so that the entire upper support plate 4 is above the thick-walled light guide 2. A row of light-emitting units 1 is provided on the lower end face of the upper support plate 4. When the row of light-emitting units 1 is lit, the entire car taillight is lit. The lower support plate 3 and the upper support plate 4 not only provide a stable mechanical support to ensure the overall stability of the device, but also protect the internal optical components, extend the service life, simplify the assembly process, and reduce production costs.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A thick-walled light guide light-emitting device for automobile taillights, comprising a light-emitting element (1) and a thick-walled light guide (2) optically coupled to the light-emitting element (1), the thick-walled light guide (2) comprising a light-inlet surface (21) facing the light-emitting element (1), a reflective pattern (20) disposed on the inner surface of the thick-walled light guide (2) for controlling the light propagation path, and a light-emitting area (22) disposed on the outer surface of the thick-walled light guide (2), wherein at least two refractive pattern areas (23) are disposed on the light-emitting area (22), and the refractive pattern areas (23) have refractive units (24) for directional refraction of light incident on the refractive pattern areas (23), characterized in that: The light-emitting area (22) also includes at least one patterned area (25) forming a preset pattern. The light reflected by the reflective pattern (20) to the patterned area (25) is directly transmitted out of the light-emitting area (22) to form a preset luminous pattern. The patterned area (25) is located between the two refractive patterned areas (23), and the three are distributed at intervals on the light-emitting area (22) to achieve the required light distribution and preset light-emitting pattern display.

2. The thick-walled light guide light-emitting device for automobile taillights according to claim 1, characterized in that, The thick-walled light guide (2) has a focusing frame (26) forming around the refractive pattern area (23) and the shaped pattern area (25). The focusing frame (26) includes an upper focusing surface (200) located on the upper end of the light-emitting area (22) facing downward and adjacent to the upper end of the shaped pattern, a lower focusing surface (201) located on the lower end of the light-emitting area (22) facing upward and adjacent to the lower end of the shaped pattern, a left focusing surface (202) located on the left side of the light-emitting area (22) and connected to the leftmost refractive pattern area, and a right focusing surface (203) located on the right side of the light-emitting area (22) and connected to the rightmost refractive pattern area.

3. The thick-walled light guide light-emitting device for automobile taillights according to claim 2, characterized in that, The patterned area is composed of three thin light strips (204). The ends of the three thin light strips (204) that are close to each other are connected to form a "Y"-shaped structure that is horizontally placed along the length of the thick-walled light guide (2). The upward-sloping thin light strip (204) in the patterned area is connected to the upper light-concentrating surface (200) of the light-concentrating frame (26), and the downward-sloping thin light strip (204) in the patterned area is connected to the lower light-concentrating surface (201) of the light-concentrating frame (26).

4. The thick-walled light guide light-emitting device for automobile taillights according to claim 3, characterized in that, The patterned area has a first light-emitting surface (205) arranged along the length direction of the thick-walled light guide (2), and the light reflected by the reflective pattern (20) to the patterned area (25) is transmitted through the first light-emitting surface (205).

5. A thick-walled light guide light-emitting device for automobile taillights according to claim 4, characterized in that, The refractive pattern area (23) includes several refractive units (24) arranged in an array along the length of the thick-walled light guide (2) within the light-concentrating frame (26). Each refractive unit (24) includes a longitudinal side light surface (206) facing the side of the taillight and a second light-emitting surface (207) that transmits light directly in front of the taillight. The longitudinal side light surface (206) and the second light-emitting surface (207) in adjacent refractive units (24) are connected sequentially from front to back to form a first stepped structure.

6. A thick-walled light guide light-emitting device for automobile taillights according to claim 5, characterized in that, The longitudinal side light surface (206) and the second light-emitting surface (207) in the refractive unit (24) are tilted to the left in sync, and a reflection angle is formed between the side light surface and the second light-emitting surface (207).

7. A thick-walled light guide light-emitting device for automobile taillights according to claim 5, characterized in that, The longitudinal side light surface (206) and the second light-emitting surface (207) of the refractive unit (24) adjacent to the thick-walled light guide (2) are connected from top to bottom to form a second stepped structure.

8. A thick-walled light guide light-emitting device for automobile taillights according to claim 7, characterized in that, The upward-sloping thin light plate (204) in the patterned area forms a first focusing angle (208) with the upper focusing surface (200) of the focusing frame (26), and the downward-sloping thin light plate (204) in the patterned area forms a second focusing angle (209) with the lower focusing surface (201) of the focusing frame (26). The angle of the second focusing angle (209) is greater than the angle of the first focusing angle (208), so that the first light-emitting surface (205) is inclined along the height direction of the thick-walled light guide (2).

9. A thick-walled light guide light-emitting device for automobile taillights according to claim 5, characterized in that, The height of the refractive unit (24) along the width direction of the thick-walled light guide (2) is higher than the height of the patterned area along the width direction of the thick-walled light guide (2).

10. A thick-walled light guide light-emitting device for automobile taillights according to claim 1, characterized in that, It also includes a lower support plate (3) connected to the thick-walled light guide (2) to surround the reflective pattern (20) and an upper support plate (4) connected above the thick-walled light guide (2) for mounting the light-emitting element (1).

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